I am not convinced on his fitness or ability to last the season. Even Wenger after the game had doubts about Diaby lasting the distance. He looked good today, great performance, but I still have doubts long term.I'll admit that I wasn't a believer in Diaby, let alone in a holding role, but he convinced me today. Diaby, Arteta, and Cazorla were all fantastic and Diaby ran the midfield today (even with less possession than Liverpool); he might not have the eye for a pass, but he's a great physical presence and made great drives with the ball.